Display Device Driving Voltage Line Interference Isolation
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Solution Overview
Problem
In light-emitting display devices, driving transistors are often affected by adjacent data lines, leading to reduced gradation and display quality due to voltage interference.
Innovation Solution
The implementation of a display device configuration where first, second, and third driving voltage lines are alternately arranged between subpixels, with specific voltage lines positioned between transistors and data lines to minimize interference, ensuring effective isolation and maintaining optimal voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If driving transistors are disposed adjacent to data lines connected to neighboring subpixels, then device complexity is reduced and layout is simplified, but voltage interference occurs leading to reduced display quality and gradation
Solution Approach 1:
The patent introduces driving voltage lines as intermediary elements positioned between the driving transistors and data lines. These driving voltage lines act as mediators that electrically isolate the driving transistors from the data lines, preventing voltage interference while maintaining the adjacent disposition configuration. The intermediary driving voltage lines break the direct electrical coupling that causes interference, thus resolving the contradiction between simplified layout and voltage interference prevention.
2Area of stationary object
If driving transistors are disposed adjacent to data lines connected to neighboring subpixels, then area utilization is improved, but display quality deteriorates due to interference
Solution Approach 1:
The driving voltage lines serve as intermediary structures that enable close spacing between driving transistors and data lines without direct electrical interference. This intermediary configuration allows maximum area utilization while maintaining manufacturing precision and display quality by preventing voltage coupling effects that would otherwise require larger spacing.
3Object-affected harmful factors
If driving voltage lines are alternately arranged with different locations in adjacent pixels, then interference isolation is enhanced, but device complexity increases
Solution Approach 1:
The patent employs asymmetric arrangement of driving voltage lines where the location of driving voltage lines alternates between adjacent pixels (e.g., in odd-numbered pixels the driving voltage line is positioned at a first location, while in even-numbered pixels it is positioned at a second location). This asymmetric, alternating configuration enhances interference isolation by ensuring that driving transistors in one pixel are isolated from data lines of neighboring pixels, while the pattern repeats systematically to manage overall device complexity.
Data Source
AI summary
A display device includes: scan lines extending in a first direction; data lines extending in a second direction intersecting the first direction and receiving data voltages; first driving voltage lines extending in the second direction and receiving a first driving voltage; second driving voltage lines extending in the second direction and receiving a second driving voltage different from the first driving voltage; and pixels connected to the scan and data lines. Each of the pixels includes first, second, and third subpixels arranged in the first direction. The first driving voltage lines and the second driving voltage lines are alternately arranged in the first direction. A location of the first driving voltage line in a first pixel differs from a location of the second driving voltage line in a second pixel. The second pixel is adjacent to the first pixel in the first direction.